index ccf3976ec7be9b5e87c9c1548dd7f95e30b28ad3..0008ba60c468aacf0f7bfe91acb97fb23a72d9fa 100644 (file)
# BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
#
-#$Id: blobfiles.py,v 1.3 2002-02-27 07:33:34 grubert Exp $
+#$Id: blobfiles.py,v 1.9 2002-09-10 00:11:50 richard Exp $
'''
This module exports file storage for roundup backends.
Files are stored into a directory hierarchy.
'''
-import os, os.path
+import os
def files_in_dir(dir):
if not os.path.exists(dir):
class FileStorage:
"""Store files in some directory structure"""
-# TODO: maybe set "files"
-# def __init__(self):
-# pass
-
def filename(self, classname, nodeid, property=None):
'''Determine what the filename for the given node and optionally
property is.
None, in which case the filename does not indicate which property
is being saved.
'''
+ # determine the name of the file to write to
name = self.filename(classname, nodeid, property)
+
+ # make sure the file storage dir exists
if not os.path.exists(os.path.dirname(name)):
os.makedirs(os.path.dirname(name))
+
+ # open the temp file for writing
open(name + '.tmp', 'wb').write(content)
- self.transactions.append((self._doStoreFile, (name, )))
+ # save off the commit action
+ self.transactions.append((self.doStoreFile, (classname, nodeid,
+ property)))
def getfile(self, classname, nodeid, property):
'''Get the content of the file in the database.
try:
return open(filename, 'rb').read()
except:
+ # now try the temp pre-commit filename
try:
return open(filename+'.tmp', 'rb').read()
except:
files_dir = os.path.join(self.dir, 'files')
return files_in_dir(files_dir)
- def _doStoreFile(self, name, **databases):
- '''Must be implemented by subclass
+ def doStoreFile(self, classname, nodeid, property, **databases):
+ '''Store the file as part of a transaction commit.
'''
- raise NotImplementedError
+ # determine the name of the file to write to
+ name = self.filename(classname, nodeid, property)
+
+ # the file is currently ".tmp" - move it to its real name to commit
+ os.rename(name+".tmp", name)
+
+ # return the classname, nodeid so we reindex this content
+ return (classname, nodeid)
+
+ def rollbackStoreFile(self, classname, nodeid, property, **databases):
+ '''Remove the temp file as a part of a rollback
+ '''
+ # determine the name of the file to delete
+ name = self.filename(classname, nodeid, property)
+ if os.path.exists(name+".tmp"):
+ os.remove(name+".tmp")
-# $Log: not supported by cvs2svn $
-#
# vim: set filetype=python ts=4 sw=4 et si